The train is moving slowly. 11-year-old Dan and 14-year-old Amy are studying the currently meaningless clue that they have acquired in the catacombs of Paris. Little do they know that the Holts are hot on their trail. One False Note is the second installment of the 39 Clues Series. Gordan Korman, who certainly believes that action is like division, has written this book. 39 clues, without its unique action, would become very hard to understand.

An awesome train ride is not what they were thinking of when they were trying to decipher the clue in Mozart's sheet music. Unfortunately for them they were interrupted by the Holts who are not some people you want to be interrupted by when you have something that they are longing for. This forced them to run fast, causing total chaos and pandemonium. But you can't run off the train. This must have caused an unplanned plan B as Saladin swallowed the clue then and there. This caused a planned plan B between the Holts as they jumped off the train like they do it every day (which they probably do considering that they're the Holts).

Luckily Dan had a photographic memory and was able to rewrite the sheet music. As they reached Vienna they realized that Mozart had a younger sister called Maria Anna 'Nannerl' Mozart. They went to a library and asked for her diary. But who should have found it and stolen it? None other than Jonah Wizard. With great trouble they stole it from him and had it translated. They discovered that 3 pages were missing. They even discovered that there was something else to Mozart's music.

There is so much suspense and danger in this book. I feel that it will really interest children around 11-12 years of age. Rest assured that you'll be drawn into this suspenseful tale.

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